st: Sensitivity analysis for quasi-experiments

Dear Stata List Members,
Paul Rosenbaum, in his book Observational Studies, presents formulas for
performing "sensitivity analysis" in observational studies--where the
treatment groups are not assigned randomly. Sensitivity analysis is used to
estimate the likelihood that hidden bias might account for a statistically
significant association between the treatment and outcome.
I have been unable to find a user-written Stata ado file for performing this
type of sensitivity analysis. Does anyone on the list know if such exists?
Thanks.
Dan Chandler
*****************************
Daniel Chandler, Research Director
California Institute for Mental Health Welfare Reform Project
436 Old Wagon Road
Trinidad, CA 95570
Internet: dwchandl@humboldt1.com
Phone and fax phone: (707) 677 0895
Research reports available at www.cimh.org/calworks
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/